Concentration threshold effect on properties of zinc‐doped lithium niobate crystals

Палатников, М. Н.; Сидоров, Н. В.; Макарова, О. В.; Manukovskaya, D. V.; Алешина, Л. А.; Kadetova, A. V.

doi:10.1111/jace.14851

Cited by 29 publications

(14 citation statements)

References 25 publications

(124 reference statements)

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“…This indicates that doping Hf 4+ , Yb 3+ , and Nd 3+ , or changing [Li]/[Nb] ratios, will not change the internal structure of LiNbO 3 crystals. This verified that after adding the Hf, Yb, and Nd ions to crystal lattice of LiNbO 3 , the structure did not change dramatically, in which new phase did not produce and the crystal still belonged to the trigonal system [22]. Based on the ion radius approximation principle in the crystal field theory, the doped ion entered crystal lattice by replacing the Li + and Nb 5+ ion instead of occupying the slot among crystal lattice.…”

Section: Xrd Diffraction Analysismentioning

confidence: 55%

Birefringence Gradient and Exposure Energy of Hf:Yb:Nd:LiNbO3 Crystals with Various [Li]/[Nb] Ratios

et al. 2018

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A series of Hf:Yb:Nd:LiNbO 3 crystals with different [Li]/[Nb] ratios (0.946, 1.05, 1.20, and 1.38) were grown using the Czochralski method. X-ray diffraction phase results of the samples show that the LiNbO 3 doped Hf 4+ , Yb 3+ , and Nd 3+ only have a slight change in the lattice constant. The birefringence gradient of the HfYbNd4 sample measured using the birefringence gradient method was 3.3 × 10 −5 ∆R/cm −1 , which was the best optical uniformity. The optical damage resistance ability was measured using the light-induced scattering exposure energy flus threshold method. When the [Li]/[Nb] ratios in the melt achieve 1.38, the exposure energy achieves 120.74 J/cm 2 , which is approximately 87 times higher than HfYbNd1.

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Section: Xrd Diffraction Analysismentioning

confidence: 55%

Birefringence Gradient and Exposure Energy of Hf:Yb:Nd:LiNbO3 Crystals with Various [Li]/[Nb] Ratios

et al. 2018

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“…Кристалл LiNbO 3 как нестехиометрическая фаза переменного состава, дефицитная по литию, имеет высокую концентрацию антиструктурных дефектов Nb Li (катионов Nb, находящихся в позициях катионов Li идеальной стехиометрической структуры) и катионных вакансий в позиции лития V Li [3]. Такие дефекты практически отсутствуют в структуре сильно легированных кристаллов LiNbO 3 : ZnО или их концентрация сведена к минимуму [3,18]. окружении собственных дефектов кристалла, образованных катионами лития, ниобия и вакансиями, положение которых может быть отлично от такового в идеальной стехиометрической структуре LiNbO 3 [3].…”

Section: результаты и обсуждениеunclassified

Исследование механизмов изменения степени униполярности при термической обработке сильно легированных кристаллов LiNbO-=SUB=-3-=/SUB=-:ZnO

Палатников¹,

Sandler²,

Sidorov³

et al. 2020

Журнал Технической Физики

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Phenomenological mechanisms of an increase in unipolarity degree at thermal treatment under short circuit conditions of strongly doped crystals are researched by comparison with thermal behavior of nominally pure LiNbO3 crystals of congruent composition. It has been shown that an increase in unipolarity degree, and correspondingly vanishing of domain structure in strongly doped LiNbO3:ZnО crystals starts by thermal decomposition of charged polar clusters. These clusters stabilize domain walls. The decomposition is accompanied by sharp jump-like injection of additional charge carriers (Li+ cations). Due to this, conductivity of LiNbO3:ZnО crystals is one order of magnitude higher at temperature above 800K than in nominally pure LiNbO3 crystals of congruent composition. The injection leads to decomposition of domain structure in LiNbO3:ZnО crystals in spite of LiNbO3 crystals of congruent composition.

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“…Влияние легирующего катиона на свойства кристаллов 3 LiNbO носит скачкообразный характер [5][6][7], что определяется термином «концентрационный порог» (КП). Наибольшее изменение структуры кристаллов наблюдается при достижении КП [6][7][8] LiNbO Zn [9]. Временные зависимости картин ФИРС в кристаллах…”

Section: введение и постановка задачиunclassified

Concentration Threshold in Linbo:tb Crystals

Палатников¹,

Сидоров²,

Кадетова³

et al. 2020

Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials

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Выращена серия кристаллов ниобата лития, легированных тербием. Исследованы процессы кристаллизации кристаллов LiNbO:Tb ([Tb] = 0,1-2,89 мас.%) и концентрационные зависимости их структурных характеристик. Проведены сравнительные исследования фоторефрактивных свойств кристаллов LiNbO:Tb различного химического состава. В кристаллах LiNbO:Tb обнаружен концентрационный порог вблизи [Tb]~2,2-2,3 мас.%, в области которого наблюдаются аномалии физико-химических, оптических и структурных характеристик. A series of lithium niobate crystals doped with terbium was grown. Processes of crystallization and concentration dependences of structural characteristics were studied in LiNbO:Tb ([Tb] = 0,1-2,89 wt%) crystals. Comparative studies of the photorefractive properties of crystals LiNbO:Tb of various chemical composition are carried out. A concentration threshold was determined in LiNbO:Tb crystals near [Tb]~ 2.2-2.3 wt%. Anomalies of physic-chemical, optical and structural characteristics are observed in this area.

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Concentration threshold effect on properties of zinc‐doped lithium niobate crystals

Cited by 29 publications

References 25 publications

Birefringence Gradient and Exposure Energy of Hf:Yb:Nd:LiNbO3 Crystals with Various [Li]/[Nb] Ratios

Birefringence Gradient and Exposure Energy of Hf:Yb:Nd:LiNbO3 Crystals with Various [Li]/[Nb] Ratios

Исследование механизмов изменения степени униполярности при термической обработке сильно легированных кристаллов LiNbO-=SUB=-3-=/SUB=-:ZnO

Concentration Threshold in Linbo:tb Crystals

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